300 MW机组循环流化床锅炉节能改造

摘要

针对某台300 MW机组循环流化床(以下简称CFB)锅炉排烟温度高的问题,对锅炉进行了技术改造:①增加水冷壁延伸墙；②减少高温过热器吹灰器枪管伸入炉内的长度,并在现有吹灰器对侧布置另一组吹灰器；③安装低压省煤器；④增加空气预热器蓄热元件.对节能改造后的锅炉进行实测,排烟温度降低16℃,热耗率降低42.31 kJ/(kW·h),发电煤耗率降低1.6 g/(kW·h),效果良好.%According to the problem of high gas temperature of 300-MW CFB boilers, several innovations are made during overhauling. First, extended walls are added to the water-cooled walls. Second, the length of soot-blowers for high-temperature superheaters entering the furnace is shortened, and another group of soot-blowers is installed on the opposite side of the existing soot-blowers. Third, low-pressure economizer is installed, and finally, additional regenerative components are installed in the air preheater. After such modifications, the gas temperature is reduced by 16℃ with the heat consumption rate reduced by 42.31 kJ/(kW· h) and the gross coal consumption rate reduced by 1.6 g/(kW· h). The innovations yield excellent results in energy conservation.